*{
	margin:0px;
	padding:0px;
	font-family:"宋体";
}
.top{
	background-color: black;
	width:100%;
	height:50px;
}
.top_content{
	width:75%;
	height:50px;
	margin:0px auto;
	background-color: blue;
}
.body{
	margin:10px auto 0px auto;
	width:75%;
	height:1900px;
	background-color: pink;
	
}
.body_img{
	width:100%;
	height:300px;
	background-color: purple;
}
.body_content_1{
	width:100%;
	height:400px;
	background-color: yellow;
}
.body_content_2{
	width:100%;
	height:400px;
	background-color:#CC9933;
}
.body_content_3{
	width:100%;
	height:400px;
	background-color:#CC00CC;
}
.body_content_4{
	width:100%;
	height:400px;
	background-color:#0000FF;
}
.body_title_1{
	width:100%;
	height:50px;
	background-color: green;
}
.body_title_2{
	width:100%;
	height:50px;
	background-color:#66FFCC;
}
.body_title_3{
	width:100%;
	height:50px;
	background-color:#66FFFF;
}
.body_title_4{
	width:100%;
	height:50px;
	background-color:#330000;
}
.footing{
	margin:0px auto;
	width:75%;
	height:70px;
	background-color: indigo;
}
.footing_subnav{
	width:100%;
	height:70px;
	background-color: yellow;
}